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《瑞丽茜树快速繁殖和离体保存(简报).pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、王垃细辫学2014,43(3):262—263瑞丽茜树快速繁殖和离体保存(简报)李爱花,程治英,杨湘云(中国科学院昆明植物研究所,中国西南野生生物种质资源库,云南昆明650204)摘要:对极小种群物种瑞丽茜~Fosbergiashweliensis的组织培养和离体保存技术进行研究。结果表明,以种子苗茎尖和成年植株幼嫩茎段为外植体均能诱导无茵苗,适宜的启动培养基分别为MS+2mg·L6-BA+0.2mg.LNAA+3%蔗糖和MS+3mg·L6-BA+0.1mg·LNAA+3%蔗糖,增殖率达3~4倍。诱导生根的适宜培养基为I/2
2、MS+lmg·LIBA+2%蔗糖,生根率100%,移栽成活率90%以上。完整试管苗在培养基1/2MS+3%蔗糖,12~15℃条件下可缓慢生长,继代时间可延长为18~24个月一次,实现了该物种的离体保存。关键词:瑞丽茜树;快速繁殖;离体保存Doi:10.39698.issn.1009-7791.2014.03.018中图分类号:Q943.1文献标iRti-~:B文章编号:1009-7791(2014)03-0262—02RapidPropagationandinvitroConservationofFosbergiashwel
3、iensisLIAi.hua.CHENGZhi.ying.YNGXiang—yun(GermplasmBankofWildSpecies,KunmingInstituteofBotany,ChineseAcademyofSciences,Kunming650204,YunnanChina)Abstract:ThetechniquesoftissuecultureandinvitroconservationofFosbergiashwelienswerestudied.Theresultsshowedtheasepticpla
4、ntletscouldbeobtainedfromstemtipofseedlingsandstemnodeexplantsofFshweliensis.TheirsuitableinitialmediumwasMSmediumwith3.0mg·L6.BA。0.1mg·LNAAand3%sucrose。andMSmediumwith2.0mg·L~6.BA,0.1mg·LNAAand3%sucrose.respectively.Themultiplicationratewasupto3__4times.Thebestroo
5、tingforplantletsoccurredon1/2MSmediumwith1.0mg·LIBAand2%sucrose.therootingratewas100%.Thesurvivalrateofasepticplantletstransplantedafterhardeningwasmorethan90%.Thetube.testplantletscouldgrowslowlyon1/2MSmediumwith3%sucroseat12一l5℃.inconsequencesubcultureperiodwasle
6、ngthenedto18—24months.Thesuccessofrapidpropagationandinvitroconservationsupportedthefurtherresearch,developmentandutilizationofthisspecies.Keywords:Fosbergiashweliensis;rapidpropagation;invitroconservation1植物名称瑞丽茜树Fosbergiashweliensis2材料类别种子及种子苗的叶片、子叶、下胚轴和茎尖;成年植株的茎
7、尖和带节的幼嫩茎段。3培养条件培养基:①1/2MS+3%蔗糖;②Ms+2mg-L6一BA+0.2mg·LNAA+3%蔗糖;③MS+3mg‘L6一BA+O.1mg·LNAA+3%蔗糖;④1/2MS+1mg·LIBA+2%蔗糖;⑤1/2Ms+1mg·LIAA+2%蔗糖;⑥1/2MS+2mg·LNAA+2%蔗糖。以上培养基均含0.67%琼脂粉,pH5.8,培养温度(26±2)℃;光照培养12h·,光照强度20∞l·m-2.S;暗培养为24h·。离体保存培养物为试管苗,保存温度12~15℃。4生长与分化情况4.1无茵材料获得种子于2
8、009年采自云南省腾冲市高黎贡山自然保护区。取1O粒种子水中浸泡2d,流水冲洗30min,再用75%乙醇浸泡30S,用0.1%升汞消毒20min,无菌水漂洗3次,每次5min。从栽培的成年植株采集茎尖和幼芽切段,用洗涤剂清洗干净,流水冲洗30min,取出外植体,75%乙醇浸泡30S,用0.
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